Hi! I have 220.127.116.11 firmware, but it happened also with 18.104.22.168 . Before upgrading I connected cable and copied some folders to PC. I noticed that file transfer locked after a few seconds (returning an error of device stopped working or something like that) if I tried to transfer big files (e.g. > 50MB) or a big number of small files (some kB each). The only way I had was to transfer via WiFi using FTP. After upgrading, the issue is still present. Am I the only one? What can I do? Thanks!!